GATE EE 2016 Set 2 — Question 58
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Power Electronics → AC-DC Converters → Bidirectional VSC
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Question
A single-phase bi-directional voltage source converter (VSC) is shown in the figure below. All devices are ideal. It is used to charge a battery at with power of from a source , sinusoidal AC mains at unity p.f. If its AC side interfacing inductor is and the switches are operated at , then the phase shift () between AC mains voltage () and fundamental AC rms VSC voltage (), in degree, is _________.
Correct answer
9.1 to 9.3
Solution
Given:
Power
Source voltage
Power factor (unity p.f.)
Inductance
Frequency The source current is:The reactance of the interfacing inductor is:From the phasor diagram for a VSC acting as a rectifier at unity power factor, the relationship between the source voltage and the fundamental converter voltage is:Taking as the reference phasor ():The phase shift is the angle of relative to :
Power
Source voltage
Power factor (unity p.f.)
Inductance
Frequency The source current is:The reactance of the interfacing inductor is:From the phasor diagram for a VSC acting as a rectifier at unity power factor, the relationship between the source voltage and the fundamental converter voltage is:Taking as the reference phasor ():The phase shift is the angle of relative to :
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